The Supereal SR9900 is a compact 10/100M Ethernet controller that integrates an IEEE 802.3u-compliant MAC, USB bus controller, embedded memory, and LDO regulator. It ensures reliable data transmission using DSP and mixed-signal technology over CAT 5 or CAT 3 cables. Features include auto crossover, polarity correction, adaptive equalization, and remote wake-up via Magic Packet. With USB 2.0 support, ACPI compliance, and IEEE 802.3az energy-saving modes, it suits desktops, servers, docking stations, and embedded systems with efficient, low-power networking.